The Diocese of Ajaccio (Latin: Dioecesis Adiacensis; French: Diocèse d'Ajaccio) is a Latin Church ecclesiastical jurisdiction or diocese of the Catholic Church in France. The diocese comprises the whole of the island of Corsica. Erected in the 3rd century, the diocese was formerly a suffragan of the Archdiocese of Pisa. After the French Concordat of 1801, the diocese became a suffragan of the Archdiocese of Aix-en-Provence and Arles, until 2002 when it was attached to the archdiocesan province of Marseille. In 2012, in the diocese of Ajaccio, there was one priest for every 3,636 Catholics. History Its first bishop known to history was Evandrus, who assisted at the Council of Rome in 313. In 1077, Pope Gregory VII granted the sovereignty of the island of Corsica to Pisa. In 1347, Pisa was forced to cede its control over the island of Corsica to Genoa. Pope Eugene IV tried to reestablish papal sovereignty, but he failed. At the end of the sixteenth century, the Cathedral of Ajaccio had only two dignities, the Archpriest and the Archdeacon, and three Canons with three prebends. Pope Sixtus V added five Canons, making a total of ten members of the body. In 1695, there were two dignities and twelve Canons. In 1759, Ajaccio had a population of around 5,000, under the political control of the Republic of Genoa, though the diocese was suffragan to the Metropolitan of Pisa. The Cathedral had one dignity and thirteen canons, there was one monastery of monks. Before the French Revolution, Corsica contained five other dioceses: Diocese of Accia (vacant since 1563, and merged with the diocese of Mariana; both suppressed in 1790); Diocese of Aléria, an ancient city of the Phocians, whose bishop resided at Corte; Diocese of Sagone, a vanished city whose bishop resided at Calvi, while the Chapter was at Vico; Diocese of Mariana, also a vanished city, whose bishop resided at Bastia; and Diocese of Nebbio (whose bishop resided in the port of Saint-Florent). The Civil Constitution of the Clergy (1791) suppressed all these bishoprics in favor of one diocese for the entire island, called the Diocese de Corse, inside the province of the Côtes de la Méditerranée. The Byzantine ruins at Mariana perpetuate the memory of the church built by the Pisans in the 12th century. Cathedral There is a legend that the bishops banished from Africa to Corsica in 484 by Hunneric, Arian King